Fluid-pump



G. H. IRWIN, J. P. CULLON & F.'KNOWLSON.

' PLUID PUMP.

APPLICATION FILED NOV. 9, 1910.

1,025,067. Patented Apr. 3o, 11912.

UNTTED sTATEs PATENT oEErcE.

GEORGE HARTFORD IRWIN, JOHN PERCIVA'L CULLON, AND FREDERICK KNOW'LSON,

F LINDSAY, ONTARIO, CANADA.

FLUID-PUMP.

Specication of Letters Patent.

Patented Apr. 3o, 1912.

l To all lwhom t may concern Be it known that we, GEORGE HARTFORD IRWIN,JOHN PERCIVAL CULLON, and FRED- Enron KNowLsoN, all of the town AofLindsay, in the county of Victoria, in the Province of Ontario, Canada,have vjointly invented certain new and useful Improvements inFluid-Pumps, of which the following is the specication.

Our inventionrelates to improvements in fluid pumps and the object ofthe invention is to devise a simple, positive and eiiicient pump.

The invention consists of a pump having a plurality of cylinders and inwhich the piston rods are connected by universal joints to an annularmember having a cup bearing surrounding the driving shaft butindependent thereof. The pistons are actuated by a wheel keyed to thedriving shaft 4and provided with two rollers of different sizes whichbear against a track situated rear of the periphery of the annular.member. The main shaft when driven revolves the wheel secured theretocausing the major roller thereon to depress that part of the annularmember against which it bears thus forcing the adjacent piston down intothe cylinder while the portion of the wheel-` against which the minorroller bears is raised and thus the piston adjacent thereto is forced upin the cylinder, as hereinafter more particularly explained.

Figure 1 represents an elevation of a pump constructed according to` ourinvention wherein six cylinders are employed, a portion of the casingbeing removed. Fig. 2, is a vertical section through the same. Fig. 3,is a detail showing 'the annular member to which the piston rods areconnected.

In the drawings like let-ters of reference indicate corresponding partsin each iigure.

1 are the cylinders of the pump and 2 lare the pistons.

3 are the connecting rods connected to the annular member 4 by theuniversal joints. 6 is a cup bearing surrounding the drivlng shaft. 7and 8 are bearings through the sald shaft.

9 is a thrust bearing and 10 is the wheel keyed to the shaft 7 by thekey 10.

cylinders,

11 is the major rollervhaving a suitable bearing 13, and 12 is the minorroller mounted on suitable'bearings 13.

14 are the suction valves and 15 are the discharge valves both of whichare in the heads of the cylinders. Y

When the shaft 7 is driven the wheel 10 being keyed thereto revolveswith the shaft and the rollers .l1 and 12 bearing against the inclinedtrack 4 Aof the member 4 impart a reciprocating movement to the pistons2 as the rollers travelA around the said track. It is apparent that themajor roller 11 will causethe piston adjacent to the portion of thetrack beneath it to be pushed down toward head of the cylinder while thepiston adjacentto that portion of the track beneath the minor vroller 12will be correspondingly raised simultaneously no matter how manycylinders are employed. ,The major roller will push each pistondown intothe cylinder as the wheel 10. revolves and each piston as it comesbeneath the minor roller 18 will be correspondingly raised.

Many modifications may be made in our invention without departing fromthe spirit or scope of the claim thereof and the form shown is to betaken in illustrative and not limiting sense.

What we claim as our invention is: i

A fluid pump comprising a plurality of suction and discharge valves inthe heads, thereof, pistons the cylinders, an annular member, connectingrods with universal joints at both ends connect-ing the pistons and saidannular member, a driving sha-ft having suitable bearings, a wheelsecured to the shaft and a main operating roller journaled in suitablebearings attached to the wheel or disk, and a following roller journaledin like bearings and adapted to eliminate vibration of the annularmember operatively connected to the pistons as specified.

GEORGE HARTFORD IRWIN. c JOHN PEROIVAL CULLON. FREDERICK KN OWLSONWitnesses:

J MERRITT KNoWLsoN, ANNIE C. KNowLsoN.

reciprocating in

